#include<iostream> using namespace std; int main(){ int n,x,y; cin>>n>>x>>y; for(int i=1;i<=n;i++){ cout<<"("<<x<<","<<i<<")"; } cout<<endl; for(int i=1;i<=n;i++){ cout<<"("<<i<<","<<y<<")"; } cout<<endl; for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++){ if(x-y==i-j){ cout<<"("<<i<<","<<j<<")"; } } } cout<<endl; for(int i=n;i>=1;i--){ for(int j=1;j<=n;j++){ if(x+y==i+j){ cout<<"("<<i<<","<<j<<")"; } } } return 0; }